A Secure Transmission Method Based on Cooperative Interference in Multi-Cell Networks

Abstract

The invention discloses a security transmission method based on cooperation interferences in a multi-cell network. It is assumed that a base station BS 1 and a target user Rx1 in a first cell are legal communication parties; the BS1 transmits a secrete message to the Rx1; in order to improve the security of the secrete message, the BS1 builds a cooperation relationship with the base station of other cell; an eavesdropping node is interfered by using the artificial noises AN generated by the cooperation base station; moreover, the cooperation base station adjusts the powers between usable signals and AN signals; on the basis of ensuring security performance, the service quality assurance is provided for the users of the local cell as much as possible; under a condition that a transmitter only knows the statistic channel information of the eavesdropping node, the secrete message is transmitted securely in the multi-cell network; further, on the basis of ensuring the security performance, the target users of the cooperation base station are ensured to obtain reliable service quality as much as possible; in consideration of the dynamic changes of channel gains in a wireless fading environment, the cooperation scheme provided by the invention is featured by dynamic self-adaption.

Description

technical field [0001] The invention belongs to the field of information technology security, in particular to a method for secure transmission based on cooperative interference in a multi-cell network. Background technique [0002] The broadcast characteristics of wireless channels lead to the risk of eavesdropping on wireless communication, which brings great challenges to wireless system design. Realizing safe and reliable transmission in wireless environment has become a key issue. In the past, encryption technology was usually used in the upper layer of the wireless network protocol stack (for example, the user layer) to achieve secure communication, but the process of key distribution and management still faces risks. At the same time, as the computing power of computers continues to increase, existing security encryption algorithms face the risk of being cracked. In this context, physical layer security techniques are used to enhance the security of wireless communi...

AI Technical Summary

Problems solved by technology

In addition, the interference between cells will seriously affect the security performance of confidential messages

Therefore, neither the current three-node secure transmission model nor the cooperative interference mechanism can be directly applied to multi-cell network scenarios

In fact, the design of cooperative interference mechanisms in multi-cell networks is an open problem and is currently understudied

Images